AimThe process of being admitted to a hospital is widely recognised as a distressing encounter for children, frequently resulting in notable levels of anxiety. The main aim was to assess the effectiveness of bibliotherapy in reducing anxiety and to associate anxiety levels with demographic and clinical variables.MethodsThis study was conducted at a paediatric ward in a tertiary care hospital located in Tamil Nadu, India, for 3 months from 1 August 2023–30 October 2023. In this study, a one‐group pre‐test and post‐test design was employed. A sample of 60 children, aged between 5 and 12 years, was recruited using a convenience sampling method. Spence Children Anxiety Scale was used for assessing anxiety levels.ResultsThe mean age of the participants was 8.46 ± 1.91 years, and the majority, comprising 57%, were male. Following bibliotherapy, 72% of children showed mild anxiety, 28% showed moderate anxiety and no individual had considerable anxiety. Anxiety scores dropped 27%. Significant associations were found between anxiety reduction and variables such as age, educational status, and type of family.ConclusionBibliotherapy was notably effective in substantially reducing anxiety levels among children aged 5–12 years who were admitted to hospitals.